Storage unit



FIG. 1 is a front perspective view of a storage unit;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left elevation view thereof; and,

FIG. 7 is a right elevation view thereof.

The dash-dash broken lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a storage unit, as shown and described. 